Improve `GT.save()` usability #2125

Job	Run time
Test for saving table image with browser	2m 32s
build (3.9)	1m 9s
test-pandas	49s
test-windows	4m 35s
build (3.10)	1m 4s
build (3.11)	1m 22s
build (3.12)	1m 12s
Release to pypi	0s
	12m 43s

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