Add StaticAnalysis rule for plural nouns in cmdlet and parameter names

[cormacpayne]

Description

Fix for issue #2919

Add rule to check for plural nouns in a cmdlet name and parameter name. There is an exception list for nouns that end with "s", but aren't plural, so any future cmdlet/parameter that uses a noun that is flagged as plural but is singular can add that noun to that list.

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[shahabhijeet]

@cormacpayne looks good

[markcowl]

@azuresdkci retest this please

[markcowl]

LGTM, just want to make sure no additional exceptions are necessary

[markcowl]

@azuresdkci retest this please

[cormacpayne]

@markcowl any other comments?