Remove native deps: openssl-sys, git2-sys, libssh2-sys (#14302)

* Remove native deps: openssl-sys, git2-sys, libssh2-sys

Enables substrate master compiles first time on more machines.
(E.g. not needing
OPENSSL_DEV_LIB to be correctly configured.)

* cargo fmt

* Remove newline

* Update utils/frame/generate-bags/src/lib.rs

Co-authored-by: Bastian Köcher <[email protected]>

* remove trailing new line

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Co-authored-by: Bastian Köcher <[email protected]>