Rpc: deprecate `getStakeActivation` and make inactive_stake consisten… #52

Job	Run time
android (ubuntu-20.04, x86_64-linux-android)	2m 57s
ios (macos-11, aarch64-apple-ios)	11m 42s
ios (macos-11, x86_64-apple-ios)	7m 27s
android (ubuntu-20.04, aarch64-linux-android)	2m 59s
ios (macos-11, aarch64-apple-darwin)	7m 18s
android (ubuntu-20.04, i686-linux-android)	3m 11s
ios (macos-11, x86_64-apple-darwin)	6m 23s
android (ubuntu-20.04, armv7-linux-androideabi)	3m 21s
error_reporting	0s
	45m 18s

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