core: retry session connection #1994

Job	Run time
cargo fmt	6s
cargo +stable clippy (ubuntu-latest)	2m 35s
cargo +1.74 check (windows-latest)	5m 10s
cargo +1.74 check (ubuntu-latest)	2m 15s
cargo +stable check (windows-latest)	6m 2s
cross +1.74 build armv7-unknown-linux-gnueabihf	1m 1s
cargo +stable check (ubuntu-latest)	3m 9s
cross +stable build armv7-unknown-linux-gnueabihf	50s
cargo +beta check (ubuntu-latest)	2m 7s
cross +1.74 build aarch64-unknown-linux-gnu	58s
cross +stable build aarch64-unknown-linux-gnu	56s
cross +1.74 build riscv64gc-unknown-linux-gnu	1m 13s
cross +stable build riscv64gc-unknown-linux-gnu	58s
	27m 20s

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