Intermittent integration_tests failures

Sometimes there is integration test failures, sometimes not. Log of failure on `ppc64le`:
```
[00:01:02] ++ go run github.com/onsi/ginkgo/v2/ginkgo ./integration_tests
[00:01:14] Running Suite: Integration Test Suite - /usr/src/RPM/BUILD/ssh3-0.1.4/integration_tests
[00:01:14] =======================================================================================
[00:01:14] Random Seed: 1702820176
[00:01:14]
[00:01:14] Will run 10 of 10 specs
[00:01:48] ••••
[00:01:48] ------------------------------
[00:01:48] • [FAILED] [0.167 seconds]
[00:01:48] Testing the ssh3 cli With running server Insecure Client behaviour TCP port forwarding [It] works with messages larger than a typical MTU
[00:01:48] /usr/src/RPM/BUILD/ssh3-0.1.4/integration_tests/ssh3_test.go:239
[00:01:48]
[00:01:48] Timeline >>
[00:01:48] 1:36PM ERR there was an error when parsing known hosts: open /root/.ssh3/known_hosts: permission denied
[00:01:48] 1:36PM WRN could not open /root/.ssh/config: open /root/.ssh/config: permission denied, ignoring config
[00:01:48] 1:36PM WRN could not open /root/.ssh3/oidc_config.json: open /root/.ssh3/oidc_config.json: permission denied
[00:01:48] 1:36PM DBG received request from User-Agent SSH 3.0 francoismichel/ssh3 0.1.3 (major 0, minor 1, patch 3)
[00:01:48] 1:36PM ERR cannot parse identity line: unknown identity format: # OpenSSH authorized_keys file format is described in sshd(8) manual page.
[00:01:48] 1:36PM DBG parsing ssh authorized key
[00:01:48] 1:36PM DBG parsing ssh-rsa identity
[00:01:48] 1:36PM INF got request: method: CONNECT, URL: https://127.0.0.1:4433/ssh3-tests?user=builder
[00:01:48] could not read data from stdin: EOF1:36PM INF eof on tcp-forwarding channel 8
[00:01:48] 1:36PM ERR could read data on TCP socket: read tcp 127.0.0.1:50510->127.0.0.1:9090: read: connection reset by peer
[00:01:48] [FAILED] in [It] - /usr/src/RPM/BUILD/ssh3-0.1.4/integration_tests/ssh3_test.go:179 @ 12/17/23 13:36:57.51
[00:01:48] << Timeline
[00:01:48]
[00:01:48] [FAILED] Expected
[00:01:48] : "...ч5ZЊ@ Ь..."
[00:01:48] to equal |
[00:01:48] : "...ч5ZЊ@ Ь..."
[00:01:48] In [It] at: /usr/src/RPM/BUILD/ssh3-0.1.4/integration_tests/ssh3_test.go:179 @ 12/17/23 13:36:57.51
[00:01:48] ------------------------------
[00:01:54] •••••
[00:01:54]
[00:01:54] Summarizing 1 Failure:
[00:01:54] [FAIL] Testing the ssh3 cli With running server Insecure Client behaviour TCP port forwarding [It] works with messages larger than a typical MTU
[00:01:54] /usr/src/RPM/BUILD/ssh3-0.1.4/integration_tests/ssh3_test.go:179
[00:01:54]
[00:01:54] Ran 10 of 10 Specs in 40.358 seconds
[00:01:54] FAIL! -- 9 Passed | 1 Failed | 0 Pending | 0 Skipped
[00:01:54] --- FAIL: TestMessage (40.36s)
[00:01:54] FAIL
[00:01:54]
[00:01:54] Ginkgo ran 1 suite in 47.281446568s
[00:01:54]
[00:01:54] Test Suite Failed
[00:01:54] exit status 1
```
Excuse me for the garbage in the output but that's how you log even if there is no tty.

On `aarch64`:
```
[00:00:44] ++ go run github.com/onsi/ginkgo/v2/ginkgo ./integration_tests
[00:00:51] Running Suite: Integration Test Suite - /usr/src/RPM/BUILD/ssh3-0.1.4/integration_tests
[00:00:51] =======================================================================================
[00:00:51] Random Seed: 1702820760
[00:00:51]
[00:00:51] Will run 10 of 10 specs
[00:01:09] ••••
[00:01:09] ------------------------------
[00:01:09] • [FAILED] [0.079 seconds]
[00:01:09] Testing the ssh3 cli With running server Insecure Client behaviour TCP port forwarding [It] works with messages larger than a typical MTU
[00:01:09] /usr/src/RPM/BUILD/ssh3-0.1.4/integration_tests/ssh3_test.go:239
[00:01:09]
[00:01:09] Timeline >>
[00:01:09] 1:46PM ERR there was an error when parsing known hosts: open /root/.ssh3/known_hosts: permission denied
[00:01:09] 1:46PM WRN could not open /root/.ssh/config: open /root/.ssh/config: permission denied, ignoring config
[00:01:09] 1:46PM WRN could not open /root/.ssh3/oidc_config.json: open /root/.ssh3/oidc_config.json: permission denied
[00:01:09] 1:46PM DBG received request from User-Agent SSH 3.0 francoismichel/ssh3 0.1.3 (major 0, minor 1, patch 3)
[00:01:09] 1:46PM ERR cannot parse identity line: unknown identity format: # OpenSSH authorized_keys file format is described in sshd(8) manual page.
[00:01:09] 1:46PM DBG parsing ssh authorized key
[00:01:09] 1:46PM DBG parsing ssh-rsa identity
[00:01:09] 1:46PM INF got request: method: CONNECT, URL: https://127.0.0.1:4433/ssh3-tests?user=builder
[00:01:09] could not read data from stdin: EOF1:46PM INF eof on tcp-forwarding channel 8
[00:01:09] [FAILED] in [It] - /usr/src/RPM/BUILD/ssh3-0.1.4/integration_tests/ssh3_test.go:225 @ 12/17/23 13:46:23.057
[00:01:09] << Timeline
[00:01:09]
[00:01:09] [FAILED] Expected
[00:01:09] : 16640
[00:01:09] to equal
[00:01:09] : 20000
[00:01:09] In [It] at: /usr/src/RPM/BUILD/ssh3-0.1.4/integration_tests/ssh3_test.go:225 @ 12/17/23 13:46:23.057
[00:01:09] ------------------------------
[00:01:15] •••••
[00:01:15]
[00:01:15] Summarizing 1 Failure:
[00:01:15] [FAIL] Testing the ssh3 cli With running server Insecure Client behaviour TCP port forwarding [It] works with messages larger than a typical MTU
[00:01:15] /usr/src/RPM/BUILD/ssh3-0.1.4/integration_tests/ssh3_test.go:225
[00:01:15]
[00:01:15] Ran 10 of 10 Specs in 24.303 seconds
[00:01:15] FAIL! -- 9 Passed | 1 Failed | 0 Pending | 0 Skipped
[00:01:15] --- FAIL: TestMessage (24.31s)
[00:01:15] FAIL
[00:01:15]
[00:01:15] Ginkgo ran 1 suite in 28.33480022s
[00:01:15]
[00:01:15] Test Suite Failed
[00:01:15] exit status 1
```
It looks different.

We have 3 architecture and almost any build&test run cause failure on some of them.