[SQUASH ON REBASE] Revert "MdePkg/CompilerIntrinsicsLib: Add Intrinsi…

…cLib class and strcmp" (#1086)

## Description

The `strcmp` function was added to
CryptoPkg/Library/BaseCryptLib/SysCall/CrtWrapper.c in edk2 commit
46226fb. Therefore, ARM and AARCH64 modules can pick up the `strcmp`
function needed to compile code from there without adding more
functionality to `CompilerIntrinsicsLib` just for building third-party
crypto code.

- [ ] Impacts functionality?
- [ ] Impacts security?
- [x] Breaking change?
- [ ] Includes tests?
- [ ] Includes documentation?

## How This Was Tested

- CrytoBinPkg build of all architectures
- Mu Basecore CI

## Integration Instructions

- `strcmp` will no longer be provided in `ArmCompilerIntrinsicsLib`, use
another implementation if needed. Marked potentially breaking for this
reason.

Signed-off-by: Michael Kubacki <[email protected]>

MdePkg/Library/CompilerIntrinsicsLib/ArmCompilerIntrinsicsLib.inf

@@ -16,11 +16,9 @@
   MODULE_TYPE                    = BASE
   VERSION_STRING                 = 1.0
   LIBRARY_CLASS                  = CompilerIntrinsicsLib
-  LIBRARY_CLASS                  = IntrinsicLib           # MU_CHANGE: Support IntrinsicLib linking
 
 [Sources]
 
-  strcmp.c             # MU_CHANGE: Add strcmp implementation
   memcpy.c             | GCC
   memset.c             | GCC