Fix cluster() for inter-server secret (preserve initial user as before)

[azat]

Changelog category (leave one):

• Bug Fix (user-visible misbehavior in an official stable release)

Changelog entry (a user-readable short description of the changes that goes to CHANGELOG.md):

Fix cluster() for inter-server secret (preserve initial user as before)

The behaviour of cluster() with inter-server secret had been changed in #63013,
after it started to use "default" user, and this introduces a
regression.

The intention of that patch was to adjust only remote(), since it only
it accept custom user, which should be ignored.

Fixes: #66287 (cc @den-crane @pufit )
Fixes: #66352 (cc @canhld94 )
Fixes: #63013

[robot-clickhouse-ci-1]

This is an automated comment for commit bdfaffa with description of existing statuses. It's updated for the latest CI running

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Check name	Description	Status
Stateless tests	Runs stateless functional tests for ClickHouse binaries built in various configurations -- release, debug, with sanitizers, etc	❌ failure

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Stateful tests	Runs stateful functional tests for ClickHouse binaries built in various configurations -- release, debug, with sanitizers, etc	✅ success
Stress test	Runs stateless functional tests concurrently from several clients to detect concurrency-related errors	✅ success
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[azat]

Tests are not finished, fail: 6, passed: 1419, skipped

clickhouse-server: /build/src/Databases/DDLLoadingDependencyVisitor.cpp:216: static void DB::DDLLoadingDependencyVisitor::extractTableNameFromArgument(const ASTFunction &, Data &, size_t): Assertion `false' failed.

This problem had been fixed already long time ago, will do a rebase

[azat]

@pufit any clue why cloud fork sync failed? Does something required to be done from my side?

[azat]

Integration tests flaky check (asan) — Failed tests found: error: 0, passed: 141, fail: 4, skipped: 0, broken: 0, not_fail: 0

Flaky check fixed in bdfaffa (#66364)

[azat]

https://s3.amazonaws.com/clickhouse-test-reports/66364/189d1848488bb3e126df3172ac1ca18a2e315af9/integration_tests__asan__old_analyzer__[5_6].html

Fixed in da3a37c