Remove some obsolete/redundant EC_Point related tests #6636

Job	Run time
Windows (shared, x86_64, windows-2022)	11m 58s
Windows (static, x86_64, windows-2022)	8m 27s
Clang Tidy	1m 10s
Windows (amalgamation, x86_64, windows-2022)	8m 56s
macOS (shared, xcode, macos-13)	10m 22s
Linux (gcc, shared)	4m 50s
Windows (shared, x86, windows-2022)	12m 25s
macOS (amalgamation, xcode, macos-13)	8m 28s
Linux (gcc, amalgamation)	4m 13s
macOS (shared, xcode, macos-14)	3m 48s
Linux (gcc, static)	4m 18s
Analysis (coverage, gcc, ubuntu-24.04)	31m 35s
macOS (amalgamation, xcode, macos-14)	3m 19s
Linux (clang, shared)	5m 16s
Analysis (sanitizer, clang, ubuntu-24.04)	36m 10s
Analysis (valgrind, clang, ubuntu-24.04)	50m 46s
Analysis (fuzzers, gcc, ubuntu-24.04)	19m 48s
Special (examples, gcc, ubuntu-24.04)	4m 28s
Cross (cross-i386, gcc, ubuntu-22.04)	5m 47s
Special (minimized, gcc, ubuntu-24.04)	3m 16s
Cross (cross-arm32, gcc, ubuntu-24.04)	16m 29s
Analysis (lint, gcc, ubuntu-24.04)	1m 2s
Special (bsi, gcc, ubuntu-24.04)	2m 52s
Cross (cross-arm64, gcc, ubuntu-24.04)	21m 44s
Special (docs, gcc, ubuntu-24.04)	58s
Cross (cross-ppc64, gcc, ubuntu-24.04)	10m 56s
Analysis (format, gcc, ubuntu-24.04)	1m 37s
Special (no_pcurves, gcc, ubuntu-24.04)	3m 55s
Cross (cross-mips64, gcc, ubuntu-24.04)	10m 56s
Analysis (limbo, gcc, ubuntu-24.04)	3m 12s
Cross (cross-android-arm64, clang, ubuntu-24.04)	7m 32s
Cross (static, gcc, windows-2022, make)	7m 0s
Cross (cross-ios-arm64, xcode, macos-13)	4m 54s
Cross (cross-arm32-baremetal, gcc, ubuntu-24.04)	3m 32s
	5h 35m 59s

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