JS: sharpen recognition of match calls

[asgerf]

Fixes #6067

Filters out match calls that are unlikely to call String.prototype.match based on how the result is used.

Evaluation looks ok

[github-actions]

⚠️ The head of this PR and the base branch were compared for differences in the framework coverage reports. The generated reports are available in the artifacts of this workflow run. The differences will be picked up by the nightly job after the PR gets merged. The following differences were found:

java

Generated file changes for java

• Changes to framework-coverage-java.rst:

-    Java Standard Library,``java.*``,3,315,17,13,,,,,,4
+    Java Standard Library,``java.*``,3,317,17,13,,,,,,4
-    Totals,,84,1622,181,13,6,6,,33,1,58
+    Totals,,84,1624,181,13,6,6,,33,1,58

• Changes to framework-coverage-java.csv:

- java.util,,,283,,,,,,,,,,,,,,15,268
+ java.util,,,285,,,,,,,,,,,,,,15,270

[asgerf]

@tamasvajk we got a spurious diff report from the framework coverage action above ☝️. I believe it should compare against the first child of the merge commit rather than the latest SHA of target branch.