Replication requires instances of the same immudb version

[SimoneLazzaris]

I've tried a main/replica configuration between different immudb versions.
Older immudb version allowed version mismatch between main and replica instances. Upcoming 1.5.0, instead, fails if the main has a different version.

These are all the tests I've made.

main	replica	sync	works
1.3.0	1.3.1	no	yes
1.3.0	1.3.2	no	yes
1.3.0	1.4.0	no	yes
1.3.0	1.4.1	no	yes
1.3.0	1.5.0	no	no(1)
1.3.0	1.4.0	yes	no(2)
1.3.1	1.4.0	yes	no(2)
1.3.2	1.4.0	yes	no(2)
1.3.2	1.4.1	yes	yes
1.5.0	1.4.1	no	no(3)
1.5.0	1.4.1	yes	no(3)

1. rpc error: code = Unimplemented desc = unknown method streamExportTx for service immudb.schema.ImmuService
2. master is not running with synchronous replication
3. Reason: illegal arguments

Notes:

• Please note that this prevent a rolling upgrade of a replica configuration.
• Since it is not released, version 1.5.0 actually was compiled from branch chore/feat/objects, commit 9948081