[Partial fix for #1372]Added SimpleTypesExcludeFilter to exlcude validat...

...ion on simple types and also added tests to cover scenarios.

@yishaigalatzer @pranavkm @rynowak @harshgMSFT 

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- This PR does not have comments. I will add them once we agree upon the changes.
why is there still a string comparison here? shouldn't this be in the errors collection?