TypeSchema/TS: drop isWithMetaField; inline isResourceIdentifier(base) #1140

Job	Run time
test-typescript-ccda-example	1m 15s
test-on-the-fly-example	53s
test-typescript-us-core-example	35s
test-python-fhirpy-sdk	1m 16s
test-typescript-sdk-r4	17s
test-local-package-folder-example	15s
test-mustache-java-r4-example (25)	21s
test-python-sdk	1m 28s
test-csharp-sdk	1m 21s
test-mustache-java-r4-example (21)	17s
	7m 58s

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