CI: Tune the ccache size #6708

Job	Run time
Windows (shared, x86_64, windows-2022)	7m 18s
macOS (shared, xcode, macos-13)	4m 4s
Windows (static, x86_64, windows-2022)	5m 12s
macOS (amalgamation, xcode, macos-13)	2m 57s
Clang Tidy	1m 45s
Windows (amalgamation, x86_64, windows-2022)	5m 20s
Analysis (coverage, gcc, ubuntu-24.04)	36m 34s
macOS (shared, xcode, macos-14)	2m 30s
Windows (shared, x86, windows-2022)	7m 39s
Analysis (sanitizer, clang, ubuntu-24.04)	37m 29s
macOS (amalgamation, xcode, macos-14)	1m 21s
Linux (gcc, shared)	2m 39s
Analysis (valgrind, clang, ubuntu-24.04)	37m 13s
Linux (gcc, amalgamation)	1m 33s
Analysis (fuzzers, gcc, ubuntu-24.04)	28m 19s
Special (examples, gcc, ubuntu-24.04)	2m 16s
Linux (gcc, static)	2m 3s
Analysis (lint, gcc, ubuntu-24.04)	1m 39s
Special (minimized, gcc, ubuntu-24.04)	37s
Cross (cross-i386, gcc, ubuntu-22.04)	3m 10s
Linux (clang, shared)	3m 23s
Special (bsi, gcc, ubuntu-24.04)	1m 6s
Cross (cross-arm32, gcc, ubuntu-24.04)	14m 50s
Special (docs, gcc, ubuntu-24.04)	2m 35s
Cross (cross-arm64, gcc, ubuntu-24.04)	20m 56s
Analysis (format, gcc, ubuntu-24.04)	1m 55s
Cross (cross-ppc64, gcc, ubuntu-24.04)	8m 15s
Special (no_pcurves, gcc, ubuntu-24.04)	1m 31s
Analysis (limbo, gcc, ubuntu-24.04)	9m 8s
Cross (cross-mips64, gcc, ubuntu-24.04)	8m 55s
Cross (cross-android-arm64, clang, ubuntu-24.04)	7m 4s
Cross (static, gcc, windows-2022, make)	4m 6s
Cross (cross-ios-arm64, xcode, macos-13)	48s
Cross (cross-arm32-baremetal, gcc, ubuntu-24.04)	1m 29s
	4h 37m 39s

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