CI: Tune the ccache size #6710

Job	Run time
Clang Tidy	1m 55s
macOS (shared, xcode, macos-13)	7m 44s
Linux (gcc, shared)	3m 31s
macOS (amalgamation, xcode, macos-13)	5m 17s
Analysis (coverage, gcc, ubuntu-24.04)	29m 19s
Linux (gcc, amalgamation)	5m 4s
Special (examples, gcc, ubuntu-24.04)	2m 4s
macOS (shared, xcode, macos-14)	2m 47s
Analysis (sanitizer, clang, ubuntu-24.04)	50m 16s
Linux (gcc, static)	3m 50s
Special (minimized, gcc, ubuntu-24.04)	23s
macOS (amalgamation, xcode, macos-14)	4m 15s
Analysis (valgrind, clang, ubuntu-24.04)	58m 54s
Linux (clang, shared)	3m 44s
Special (bsi, gcc, ubuntu-24.04)	2m 30s
Analysis (fuzzers, gcc, ubuntu-24.04)	17m 6s
Special (docs, gcc, ubuntu-24.04)	2m 29s
Analysis (lint, gcc, ubuntu-24.04)	3m 3s
Windows (shared, x86_64, windows-2022)	8m 19s
Special (no_pcurves, gcc, ubuntu-24.04)	2m 21s
Analysis (format, gcc, ubuntu-24.04)	36s
Windows (static, x86_64, windows-2022)	6m 7s
Cross (cross-i386, gcc, ubuntu-22.04)	5m 12s
Analysis (limbo, gcc, ubuntu-24.04)	1m 43s
Windows (amalgamation, x86_64, windows-2022)	7m 58s
Cross (cross-arm32, gcc, ubuntu-24.04)	15m 52s
Windows (shared, x86, windows-2022)	12m 20s
Cross (cross-arm64, gcc, ubuntu-24.04)	13m 45s
Cross (cross-ppc64, gcc, ubuntu-24.04)	9m 59s
Cross (cross-mips64, gcc, ubuntu-24.04)	9m 43s
Cross (cross-android-arm64, clang, ubuntu-24.04)	2m 38s
Cross (static, gcc, windows-2022, make)	5m 22s
Cross (cross-ios-arm64, xcode, macos-13)	2m 34s
Cross (cross-arm32-baremetal, gcc, ubuntu-24.04)	5m 9s
	5h 13m 49s

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