core: retry session connection #1996

Job	Run time
cargo fmt	6s
cargo +stable clippy (ubuntu-latest)	2m 28s
cargo +1.74 check (windows-latest)	4m 46s
cross +1.74 build armv7-unknown-linux-gnueabihf	1m 8s
cargo +1.74 check (ubuntu-latest)	2m 21s
cargo +stable check (windows-latest)	5m 2s
cross +stable build armv7-unknown-linux-gnueabihf	2m 33s
cargo +stable check (ubuntu-latest)	3m 6s
cross +1.74 build aarch64-unknown-linux-gnu	1m 6s
cargo +beta check (ubuntu-latest)	2m 5s
cross +stable build aarch64-unknown-linux-gnu	46s
cross +1.74 build riscv64gc-unknown-linux-gnu	1m 1s
cross +stable build riscv64gc-unknown-linux-gnu	2m 43s
	29m 11s

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