JIT: SVE Cleanup - Remove unneeded comments from API surface area

[TIHan]

In these files:

• src\libraries\System.Private.CoreLib\src\System\Runtime\Intrinsics\Arm\Sve.PlatformNotSupported.cs
• src\System\Runtime\Intrinsics\Arm\Sve.cs

There are comments related to the SVE APIs that are not part of the summary blocks.
Example:

        ///  CreateTrueMaskDouble : Set predicate elements to true

        /// <summary>
        /// svbool_t svptrue_pat_b8(enum svpattern pattern)
        ///   PTRUE Presult.B, pattern
        /// </summary>
        public static unsafe Vector<double> CreateTrueMaskDouble([ConstantExpected] SveMaskPattern pattern = SveMaskPattern.All) => CreateTrueMaskDouble(pattern);

We need to remove the /// CreateTrueMaskDouble : Set predicate elements to true line.

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[a74nh]

We need to remove the /// CreateTrueMaskDouble : Set predicate elements to true line.

We just change it to a double quote // CreateTrueMaskDouble : Set predicate elements to true ??

[a74nh]

priority:2 for RC1 snap : End users will see the API