Skip custom scenario test and new flight scenario test if no internet

[jeanconn]

Description

Skip custom scenario test and flight scenario check if no internet. The tests need internet access to the google sheet.

The more complete issue is fixed in #375, but these tests can safely be skipped in advance of that PR.

Interface impacts

Testing

Unit tests

• Mac

(ska3-flight-2026.1rc5) flame:kadi jean$ git checkout skip-custom-test-no-internet
Switched to branch 'skip-custom-test-no-internet'
(ska3-flight-2026.1rc5) flame:kadi jean$ pytest 
===================================================================================== test session starts ======================================================================================
platform darwin -- Python 3.13.11, pytest-9.0.2, pluggy-1.6.0
rootdir: /Users/jean/git
configfile: pytest.ini
plugins: anyio-4.12.1, timeout-2.4.0
collected 220 items                                                                                                                                                                            

kadi/commands/tests/test_commands.py .......................................................................................                                                             [ 39%]
kadi/commands/tests/test_filter_events.py ..                                                                                                                                             [ 40%]
kadi/commands/tests/test_states.py .................................................x..........................                                                                          [ 75%]
kadi/commands/tests/test_validate.py ......................                                                                                                                              [ 85%]
kadi/tests/test_events.py ..........                                                                                                                                                     [ 89%]
kadi/tests/test_occweb.py .......................                                                                                                                                        [100%]

========================================================================== 219 passed, 1 xfailed in 180.06s (0:03:00) ==========================================================================
(ska3-flight-2026.1rc5) flame:kadi jean$ pytest
===================================================================================== test session starts ======================================================================================
platform darwin -- Python 3.13.11, pytest-9.0.2, pluggy-1.6.0
rootdir: /Users/jean/git
configfile: pytest.ini
plugins: anyio-4.12.1, timeout-2.4.0
collected 220 items                                                                                                                                                                            

kadi/commands/tests/test_commands.py .......sssssssssss..ss..................................ss..............ssss..s........                                                             [ 39%]
kadi/commands/tests/test_filter_events.py ss                                                                                                                                             [ 40%]
kadi/commands/tests/test_states.py sssssssssssssssssssssssssssss....................x..........................                                                                          [ 75%]
kadi/commands/tests/test_validate.py ssssssssssssssssssssss                                                                                                                              [ 85%]
kadi/tests/test_events.py ..........                                                                                                                                                     [ 89%]
kadi/tests/test_occweb.py sssssssssssssssssssssss                                                                                                                                        [100%]

========================================================================== 123 passed, 96 skipped, 1 xfailed in 9.93s ==========================================================================
(ska3-flight-2026.1rc5) flame:kadi jean$ git rev-parse HEAD
a4b8dea84a4180803b61ad47745f0cfee37d5c66

Independent check of unit tests by [REVIEWER NAME]

• [PLATFORM]:

Functional tests

No functional testing.