8389209: Add sccache support to the build

[raneashay]

This patch enables the --enable-sccache flag to enable build caching
using sccache. Specifically, if the toolchain is one among gcc, clang,
or MSVC and if the sccache version is 0.10 and above, then the build
prefixes all compiler invocations with the path to the sccache binary.

Since sccache is incompatible with ccache and precompiled headers, this
patch makes the build fail if either ccache or precompiled headers are
enabled in addition to sccache at the same time.

Validated this patch on {Linux, Windows, macOS} x {x64, aarch64}
machines. In the best-case scenario (i.e. when there are no changes to
the source files), the time required to run the "make images" step is
roughly cut in half. Side note: the individual machines have very
different configurations, so build times across machines aren't
comparable.

• Windows/x64: 2,107s -> 848s
• Windows/ARM64: 1,264s -> 748s
• macOS/x64: 808s -> 243s
• macOS/AArch64: 480s -> 142s
• Linux/x64: 225s -> 111s
• Linux/AArch64: 364s -> 246s

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Progress

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Issue

• JDK-8389209: Add sccache support to the build (Enhancement - P4)

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