Drop `Content` and `args` parameter in `ClientSessionGroup.call_tool`… #556

Job	Run time
checks / readme-snippets	11s
checks / pre-commit	30s
checks / test (3.10, highest, windows-latest)	2m 19s
checks / test (3.11, highest, ubuntu-latest)	44s
checks / test (3.11, highest, windows-latest)	2m 38s
checks / test (3.14, lowest-direct, windows-latest)	2m 21s
checks / test (3.12, highest, ubuntu-latest)	57s
checks / test (3.10, highest, ubuntu-latest)	46s
checks / test (3.12, lowest-direct, ubuntu-latest)	53s
checks / test (3.12, highest, windows-latest)	3m 41s
checks / test (3.13, highest, windows-latest)	2m 28s
checks / test (3.10, lowest-direct, ubuntu-latest)	46s
checks / test (3.14, highest, ubuntu-latest)	1m 11s
checks / test (3.12, lowest-direct, windows-latest)	3m 58s
checks / test (3.13, lowest-direct, ubuntu-latest)	44s
checks / test (3.11, lowest-direct, ubuntu-latest)	47s
checks / test (3.10, lowest-direct, windows-latest)	2m 18s
checks / test (3.13, highest, ubuntu-latest)	44s
checks / test (3.13, lowest-direct, windows-latest)	2m 33s
checks / test (3.11, lowest-direct, windows-latest)	2m 38s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 9s
checks / test (3.14, highest, windows-latest)	2m 25s
	36m 41s

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