Create a test for ALS config files with comments

Author: eliericha

testsuite/ada_lsp/config_comments/.als.json

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+{
+   // Single line comment
+   /* multi-line
+      comment
+   */
+   "projectFile": "non-root/p2.gpr"
+}

testsuite/ada_lsp/config_comments/non-root/p2.gpr

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+project P2 is
+end P2;

testsuite/ada_lsp/config_comments/test.py

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+"""
+The goal of this test is to check that comments are supported in .als.json files
+
+To test that, we create a non-root/p2.gpr project file and configure it in a .als.json
+with comments. We can determine if the config loading was successful (i.e. comments are
+supported) by querying for the current project.
+"""
+
+from drivers.pylsp import URI, ALSLanguageClient, assertEqual, test
+
+
+@test()
+async def func(lsp: ALSLanguageClient) -> None:
+    response = await lsp.getCurrentProject()
+    assertEqual(response, URI("non-root/p2.gpr"))

testsuite/ada_lsp/config_comments/test.yaml

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+driver: pylsp