[CPDEV-103189] Different improvements in SSH connections usage

[ilia1243]

Description

• Support calculating of sha1 for Connection.put() of in memory StringIO buffer.
• Added option NodeGroup.put(compare_hashes=True) to specify if sha1 of remote and local files should be compared.
  • The option is set to False in all cases when we do not expect existence of remote file, or expect its sha1 being always different.
• Added check of sha1 for thirdparties provided as scripts (etcdctl.sh).
• check_iaas --tasks network.ipip_connectivity now copies ipip_check binary only if is not copied yet or not actual.
• Fail connect attempts early in case of not a connection-related exceptions.
• fabric's Connection is now instantiated with channel_timeout=10 (default) to recover from problems with SSH (like in comment [MANOPD-89188] Type annotations and checks by mypy #463 (comment)).
• Other minor fixes in installation of thirdparties.

Test Cases

TestCase 1

Check if etcdctl is actual.

Steps:

1. Install cluster and manually change /usr/bin/etcdctl
2. Run check_paas --tasks thirdparties.hashes

Results:

Before	After
Check is successful	Check fails

TestCase 2

Fail early during instantiating of SSH connections.

Steps:

1. Specify incorrect path to RSA key file and run any procedure.

Results:

Before	After
Procedure fails after 30 seconds	Procedure fails immediately

Checklist

• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• Integration CI passed
• Unit tests. If Yes list of new/changed tests with brief description
• There is no merge conflicts