ozone/starboard: Enforce "egl" for Ozone Starboard platform #17356

Job	Run time
chromium_linux-x64 / initialize	1m 16s
linux / initialize	1m 18s
linux-evergreen / initialize	1m 20s
chromium_linux-x64 / docker-build-image	4m 13s
linux / docker-build-image	4m 18s
linux-evergreen / docker-build-image	3m 55s
linux-evergreen / x64_devel	9m 7s
linux-evergreen / x64_debug	9m 57s
linux-evergreen / x64_qa	9m 35s
linux-evergreen / x64_gold	9m 39s
chromium_linux-x64 / x64_devel	27m 32s
chromium_linux-x64 / x64_debug	26m 5s
chromium_linux-x64 / x64_qa	33m 34s
chromium_linux-x64 / x64_gold	32m 55s
linux / x64_devel	27m 12s
linux / x64_debug	28m 59s
linux / x64_qa	30m 34s
linux / x64_gold	30m 42s
linux-evergreen / ${{ matrix.name }}_tests	0s
linux / x64_tests	6m 41s
chromium_linux-x64 / ${{ matrix.name }}_tests	0s
	4h 58m 52s

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