Typescript-Angular: Fix several query parameters serialization issues #70

Job	Run time
Build projects (20.x, samples/client/petstore/typescript-angular-v19-provided-in-root/)	2m 5s
Build projects (20.x, samples/client/others/typescript-angular-v20/)	1m 3s
Build projects (20.x, samples/client/petstore/typescript-angular-v17-provided-in-root/)	1m 35s
Build projects (20.x, samples/client/petstore/typescript-angular-v18-provided-in-root/)	1m 44s
Build projects (20.x, samples/client/petstore/typescript-fetch/builds/es6-target/)	42s
Build projects (20.x, samples/client/petstore/typescript-angular-v20-provided-in-root/)	1m 41s
Build projects (20.x, samples/openapi3/client/petstore/typescript/builds/jquery/)	52s
Build projects (20.x, samples/openapi3/client/petstore/typescript/builds/browser/)	46s
Build projects (20.x, samples/client/petstore/typescript-fetch/builds/with-npm-version/)	52s
Build projects (20.x, samples/openapi3/client/petstore/typescript/builds/default/)	40s
Build projects (20.x, samples/client/petstore/typescript-axios/builds/with-npm-version/)	47s
Build projects (20.x, samples/client/petstore/typescript-angular-v16-provided-in-root/)	1m 43s
Build projects (20.x, samples/client/others/typescript-angular/)	1m 0s
Build projects (20.x, samples/client/petstore/typescript-rxjs/builds/with-npm-version/)	52s
Build projects (20.x, samples/client/petstore/typescript-fetch/builds/default/)	44s
Build projects (20.x, samples/client/petstore/typescript-fetch/tests/default/)	1m 19s
Build projects (20.x, samples/openapi3/client/petstore/typescript/builds/object_params/)	58s
	19m 23s

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