CodeFix: Remove relative path prefix from types loading (#12026)

## Description

The current implementation makes the wrong assumption that the key names
indexed in the types cache have a prefix `./`. This was the case when I
was using a dev artifact since the publishing logic wasn't ready.

Now that we have a publishing logic for the types package we can fix the
code so that it doesn't assume the `./` prefix is found in the files as
proven by
https://github.com/Azure/bicep-types-az/actions/runs/6398352791/job/17368317634.

This PR should be merged before
Azure/bicep-types-az#1553, and
Azure/bicep-types-az#1553 should be updated to
download the latest build from the `main` branch.

###### Microsoft Reviewers: [Open in
CodeFlow](https://microsoft.github.io/open-pr/?codeflow=https://github.com/Azure/bicep/pull/12026)

---------

Co-authored-by: Ariel Silverman <[email protected]>

Author: asilverman

.vscode/launch.json

@@ -32,10 +32,9 @@
                 "build",
                 "${file}"
             ],
-            "env": {
-                "BICEP_TRACING_ENABLED": "true",
-                // "BICEP_REGISTRY_FQDN": "your-registry-here.azurecr.io"
-            },
+          "env": {
+            "BICEP_TRACING_ENABLED": "true"
+          },
             "cwd": "${workspaceFolder}/src/Bicep.Cli",
             "console": "internalConsole",
             "stopAtEntry": false
@@ -51,7 +50,7 @@
                 "${file}"
             ],
             "env": {
-                "BICEP_TRACING_ENABLED": "true"
+                "BICEP_TRACING_ENABLED": "true",
             },
             "cwd": "${workspaceFolder}/src/Bicep.Cli",
             "console": "internalConsole",

src/Bicep.Core/TypeSystem/Az/OciAzTypeLoader.cs

@@ -53,7 +53,7 @@ public static OciAzTypeLoader FromTgz(string pathToGzip)
 
         protected override Stream GetContentStreamAtPath(string path)
         {
-            if (this.typesCache.TryGetValue($"./{path}", out var bytes))
+            if (this.typesCache.TryGetValue($"{path}", out var bytes))
             {
                 return new MemoryStream(bytes);
             }