[JITLink] Add support for R_X86_64_SIZE* relocations. (#110081)
This patch adds support for R_X86_64_SIZE32/R_X86_64_SIZE64 relocation
types by introducing edge kinds x86_64::Size32/x86_64::Size64. The
calculation for these relocations is: Z + A, where:
Z - Represents the size of the symbol whose index resides in the
relocation entry.
A - Represents the addend used to compute the value of the relocation
field.
Ref: [System V Application Binary Interface
x86-64](https://gitlab.com/x86-psABIs/x86-64-ABI/-/jobs/artifacts/master/raw/x86-64-ABI/abi.pdf?job=build)
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