Updating the documentation for System.Runtime.Intrinsics

[tannergooding]

This replaces #10155 and includes the explicit <para> tags, uses <see langword="Vector128&lt;Single&gt;" /> so that the type information is preserved, and incorporates other suggestions that were given on the PRs.

[dotnet-policy-service]

Tagging subscribers to this area: @dotnet/area-system-runtime-intrinsics

[learn-build-service-prod]

Learn Build status updates of commit 7c766c4:

✅ Validation status: passed

File	Status	Preview URL	Details
xml/System.Runtime.Intrinsics.Arm/AdvSimd.xml	✅Succeeded	View
xml/System.Runtime.Intrinsics.Arm/AdvSimd+Arm64.xml	✅Succeeded	View
xml/System.Runtime.Intrinsics.Arm/Aes.xml	✅Succeeded	View
xml/System.Runtime.Intrinsics.Arm/Aes+Arm64.xml	✅Succeeded	View
xml/System.Runtime.Intrinsics.Arm/ArmBase.xml	✅Succeeded	View
xml/System.Runtime.Intrinsics.Arm/ArmBase+Arm64.xml	✅Succeeded	View
xml/System.Runtime.Intrinsics.Arm/Crc32.xml	✅Succeeded	View
xml/System.Runtime.Intrinsics.Arm/Crc32+Arm64.xml	✅Succeeded	View
xml/System.Runtime.Intrinsics.Arm/Dp.xml	✅Succeeded	View
xml/System.Runtime.Intrinsics.Arm/Dp+Arm64.xml	✅Succeeded	View
xml/System.Runtime.Intrinsics.Arm/Rdm.xml	✅Succeeded	View
xml/System.Runtime.Intrinsics.Arm/Rdm+Arm64.xml	✅Succeeded	View
xml/System.Runtime.Intrinsics.Arm/Sha1.xml	✅Succeeded	View
xml/System.Runtime.Intrinsics.Arm/Sha1+Arm64.xml	✅Succeeded	View
xml/System.Runtime.Intrinsics.Arm/Sha256.xml	✅Succeeded	View
xml/System.Runtime.Intrinsics.Arm/Sha256+Arm64.xml	✅Succeeded	View
xml/System.Runtime.Intrinsics.Arm/Sve.xml	✅Succeeded	View
xml/System.Runtime.Intrinsics.Arm/Sve+Arm64.xml	✅Succeeded	View
xml/System.Runtime.Intrinsics.Arm/SveMaskPattern.xml	✅Succeeded	View
xml/System.Runtime.Intrinsics.Arm/SvePrefetchType.xml	✅Succeeded	View
xml/System.Runtime.Intrinsics.Wasm/PackedSimd.xml	✅Succeeded	View
xml/System.Runtime.Intrinsics.X86/Aes.xml	✅Succeeded	View
xml/System.Runtime.Intrinsics.X86/Aes+X64.xml	✅Succeeded	View
xml/System.Runtime.Intrinsics.X86/Avx.xml	✅Succeeded	View
xml/System.Runtime.Intrinsics.X86/Avx+X64.xml	✅Succeeded	View

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[gewarren]

LGTM, thanks.