Drop `Content` and `args` parameter in `ClientSessionGroup.call_tool` #4066

Job	Run time
checks / pre-commit	39s
checks / test (3.12, highest, ubuntu-latest)	56s
checks / test (3.13, lowest-direct, ubuntu-latest)	46s
checks / test (3.10, highest, windows-latest)	2m 31s
checks / test (3.11, lowest-direct, ubuntu-latest)	44s
checks / test (3.12, lowest-direct, ubuntu-latest)	52s
checks / test (3.12, highest, windows-latest)	3m 29s
checks / test (3.12, lowest-direct, windows-latest)	4m 37s
checks / test (3.11, lowest-direct, windows-latest)	2m 40s
checks / test (3.10, highest, ubuntu-latest)	48s
checks / test (3.10, lowest-direct, windows-latest)	2m 26s
checks / test (3.11, highest, ubuntu-latest)	46s
checks / test (3.13, highest, windows-latest)	2m 36s
checks / test (3.14, lowest-direct, windows-latest)	2m 19s
checks / test (3.13, highest, ubuntu-latest)	48s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 7s
checks / test (3.14, highest, ubuntu-latest)	1m 13s
checks / test (3.11, highest, windows-latest)	2m 52s
checks / test (3.14, highest, windows-latest)	2m 19s
checks / readme-snippets	11s
checks / test (3.10, lowest-direct, ubuntu-latest)	51s
checks / test (3.13, lowest-direct, windows-latest)	2m 27s
	37m 57s

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