Poc yaml observations

[HakonSohoel]

Issue
Resolves #10795

• PR title captures the intent of the changes, and is fitting for release notes.
• Added appropriate release note label
• Commit history is consistent and clean, in line with the contribution guidelines.
• Make sure unit tests pass locally after every commit (git rebase -i main --exec 'just rapid-tests')

When applicable

• When there are user facing changes: Updated documentation
• New behavior or changes to existing untested code: Ensured that unit tests are added (See Ground Rules).
• Large PR: Prepare changes in small commits for more convenient review
• Bug fix: Add regression test for the bug
• Bug fix: Add backport label to latest release (format: 'backport release-branch-name')

[codecov-commenter]

❌ 1 Tests Failed:

Tests completed	Failed	Passed	Skipped
3404	1	3403	89

View the full list of 1 ❄️ flaky test(s)

tests/ert/unit_tests/config/parsing/test_observations_parser.py::test_parse_observations

Flake rate in main: 88.82% (Passed 17 times, Failed 135 times)

Stack Traces | 0.035s run time

def test_parse_observations():
>       assert parse_observations(
            """
            HISTORY_OBSERVATION FOPR;
    
            SUMMARY_OBSERVATION WOPR_OP1_9
            {
                VALUE   = 0.1;
                ERROR   = 0.05;
                DATE    = 2010-03-31;  -- (RESTART = 9)
                KEY     = WOPR:OP1;
            };
    
            GENERAL_OBSERVATION WPR_DIFF_1 {
               DATA       = SNAKE_OIL_WPR_DIFF;
               INDEX_LIST = 400,800,1200,1800;
               DATE       = 2015-06-13;-- (RESTART = 199)
               OBS_FILE   = wpr_diff_obs.txt;
            };
    
    
            GENERAL_OBSERVATION WPR_DIFF_2 {
               DATA       = SNAKE_OIL_WPR_DIFF;
               INDEX_FILE = wpr_diff_idx.txt;
               DATE       = 2015-06-13;  -- (RESTART = 199)
               OBS_FILE   = wpr_diff_obs.txt;
            };
    
            HISTORY_OBSERVATION  FWPR
            {
               ERROR      = 0.1;
    
               SEGMENT SEG
               {
                  START = 1;
                  STOP  = 0;
                  ERROR = 0.25;
               };
            };--comment
        """,
            "",
        ) == [
            {"type": ObservationType.HISTORY, "name": "FOPR"},
            {
                "type": ObservationType.SUMMARY,
                "name": "WOPR_OP1_9",
                "VALUE": "0.1",
                "ERROR": "0.05",
                "DATE": "2010-03-31",
                "KEY": "WOPR:OP1",
            },
            {
                "type": ObservationType.GENERAL,
                "name": "WPR_DIFF_1",
                "DATA": "SNAKE_OIL_WPR_DIFF",
                "INDEX_LIST": "400,800,1200,1800",
                "DATE": "2015-06-13",
                "OBS_FILE": "wpr_diff_obs.txt",
            },
            {
                "type": ObservationType.GENERAL,
                "name": "WPR_DIFF_2",
                "DATA": "SNAKE_OIL_WPR_DIFF",
                "INDEX_FILE": "wpr_diff_idx.txt",
                "DATE": "2015-06-13",
                "OBS_FILE": "wpr_diff_obs.txt",
            },
            {
                "type": ObservationType.HISTORY,
                "name": "FWPR",
                "ERROR": "0.1",
                "segments": [("SEG", {"START": "1", "STOP": "0", "ERROR": "0.25"})],
            },
        ]

.../config/parsing/test_observations_parser.py:13: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
.../config/parsing/observations_parser.py:55: in parse_observations
    relative_filename = os.path.relpath(filename)
                        ^^^^^^^^^^^^^^^^^^^^^^^^^
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

path = '', start = None

>   ???
E   ValueError: no path specified

<frozen posixpath>:507: ValueError

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[codspeed-hq]

CodSpeed Performance Report

Merging #11946 will not alter performance

_{Comparing POC-yaml-observations (802f54c) with main (31826f3)}

Summary

✅ 22 untouched