[processor/unroll]: upstream unroll processor (#42500)

<!--Ex. Fixing a bug - Describe the bug and how this fixes the issue.
Ex. Adding a feature - Explain what this achieves.-->
#### Description

Adds a new log processor component that will take a log body of slices
and expand them into multiple log entries within the ScopeLogs.

This is a component we made in the [Bindplane Distro of the
Collector](https://github.com/observIQ/bindplane-otel-collector/tree/main).
We initially solved it for logs without proper parsing extensions. This
pairs quite well with the
[transformprocessor](https://github.com/open-telemetry/opentelemetry-collector-contrib/tree/main/processor/transformprocessor)
to
[Split](https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/0c2a3255d7fb3eb3ec25f2eb2c16e644d9684ad8/pkg/ottl/ottlfuncs/README.md#split)
and unroll say based off improperly formatted newlines depending on the
receiver sending the data.

<!-- Issue number (e.g. #1234) or full URL to issue, if applicable. -->
#### Link to tracking issue
Fixes #42491

<!--Describe what testing was performed and which tests were added.-->
#### Testing

Believe to be properly unit tested, however its been a second since I've
added a component so happy to add some more tests where they are
applicable.

<!--Describe the documentation added.-->
#### Documentation

<!--Please delete paragraphs that you did not use before submitting.-->

Author: schmikei

.chloggen/feat_unroll-processor.yaml

@@ -0,0 +1,27 @@
+# Use this changelog template to create an entry for release notes.
+
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: new_component
+
+# The name of the component, or a single word describing the area of concern, (e.g. filelogreceiver)
+component: unrollprocessor
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: Adds a processor that generically takes a log body of slices and creates new entries from that slice.
+
+# Mandatory: One or more tracking issues related to the change. You can use the PR number here if no issue exists.
+issues: [42491]
+
+# (Optional) One or more lines of additional information to render under the primary note.
+# These lines will be padded with 2 spaces and then inserted directly into the document.
+# Use pipe (|) for multiline entries.
+subtext:
+
+# If your change doesn't affect end users or the exported elements of any package,
+# you should instead start your pull request title with [chore] or use the "Skip Changelog" label.
+# Optional: The change log or logs in which this entry should be included.
+# e.g. '[user]' or '[user, api]'
+# Include 'user' if the change is relevant to end users.
+# Include 'api' if there is a change to a library API.
+# Default: '[user]'
+change_logs: []

.codecov.yml

@@ -544,6 +544,10 @@ component_management:
     name: processor_transform
     paths:
     - processor/transformprocessor/**
+  - component_id: processor_unroll
+    name: processor_unroll
+    paths:
+    - processor/unrollprocessor/**
   - component_id: receiver_activedirectoryds
     name: receiver_activedirectoryds
     paths:

.github/CODEOWNERS

@@ -217,6 +217,7 @@ processor/spanprocessor/                                         @open-telemetry
 processor/sumologicprocessor/                                    @open-telemetry/collector-contrib-approvers @rnishtala-sumo @chan-tim-sumo @echlebek @amdprophet
 processor/tailsamplingprocessor/                                 @open-telemetry/collector-contrib-approvers @portertech
 processor/transformprocessor/                                    @open-telemetry/collector-contrib-approvers @TylerHelmuth @evan-bradley @edmocosta
+processor/unrollprocessor/                                       @open-telemetry/collector-contrib-approvers @axw @schmikei @rnishtala-sumo
 receiver/activedirectorydsreceiver/                              @open-telemetry/collector-contrib-approvers @pjanotti
 receiver/aerospikereceiver/                                      @open-telemetry/collector-contrib-approvers @antonblock
 receiver/apachereceiver/                                         @open-telemetry/collector-contrib-approvers @colelaven @ishleenk17

.github/ISSUE_TEMPLATE/beta_stability.yaml

@@ -218,6 +218,7 @@ body:
       - processor/sumologic
       - processor/tailsampling
       - processor/transform
+      - processor/unroll
       - receiver/activedirectoryds
       - receiver/aerospike
       - receiver/apache

.github/ISSUE_TEMPLATE/bug_report.yaml

@@ -221,6 +221,7 @@ body:
       - processor/sumologic
       - processor/tailsampling
       - processor/transform
+      - processor/unroll
       - receiver/activedirectoryds
       - receiver/aerospike
       - receiver/apache

.github/ISSUE_TEMPLATE/feature_request.yaml

@@ -215,6 +215,7 @@ body:
       - processor/sumologic
       - processor/tailsampling
       - processor/transform
+      - processor/unroll
       - receiver/activedirectoryds
       - receiver/aerospike
       - receiver/apache

.github/ISSUE_TEMPLATE/other.yaml

@@ -215,6 +215,7 @@ body:
       - processor/sumologic
       - processor/tailsampling
       - processor/transform
+      - processor/unroll
       - receiver/activedirectoryds
       - receiver/aerospike
       - receiver/apache

.github/ISSUE_TEMPLATE/unmaintained.yaml

@@ -220,6 +220,7 @@ body:
       - processor/sumologic
       - processor/tailsampling
       - processor/transform
+      - processor/unroll
       - receiver/activedirectoryds
       - receiver/aerospike
       - receiver/apache

.github/component_labels.txt

@@ -198,6 +198,7 @@ processor/spanprocessor processor/span
 processor/sumologicprocessor processor/sumologic
 processor/tailsamplingprocessor processor/tailsampling
 processor/transformprocessor processor/transform
+processor/unrollprocessor processor/unroll
 receiver/activedirectorydsreceiver receiver/activedirectoryds
 receiver/aerospikereceiver receiver/aerospike
 receiver/apachereceiver receiver/apache

internal/tidylist/tidylist.txt

@@ -225,6 +225,7 @@ processor/resourceprocessor
 processor/schemaprocessor
 processor/spanprocessor
 processor/sumologicprocessor
+processor/unrollprocessor
 receiver/activedirectorydsreceiver
 receiver/aerospikereceiver
 receiver/apachereceiver