Add kwargs field to `SignedTransaction` #2590

Job	Run time
common_checks_2	1m 0s
common_checks_1	2m 46s
common_checks_3	1m 12s
common_checks_4	1m 1s
common_checks_5	1m 11s
copyright_check	38s
dependencies_checks (ubuntu-latest, 3.10)	35s
docs_link_check	1m 10s
dependencies_checks (macos-latest, 3.10)	56s
plugins_install_check (windows-latest, msys2 {0}, 3.10)	56s
dependencies_checks (windows-latest, 3.10)	1m 4s
protolint	25s
plugins_install_check (ubuntu-latest, bash, 3.10)	1m 6s
gitleaks	27s
platform_checks	1s
profiling_checks	1s
integration_checks	1s
integration_checks_ledger	1s
golang_checks	1s
	14m 32s

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