fix: Fix serialization issues in creation of Vaadin mocks

[TatuLund]

Fixes

java.io.NotSerializableException: com.vaadin.testbench.unit.BaseUIUnitTest$$Lambda$2828/0x0000755804ecbf70
	at java.base/java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1187)
	at java.base/java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1572)
	at java.base/java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1529)
	at java.base/java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1438)

Which is cased by

java.io.NotSerializableException: com.vaadin.testbench.unit.BaseUIUnitTest$$Lambda/0x00007414ec76b3a0
	- field (class "com.vaadin.testbench.unit.internal.MockVaadinKt$sam$com_vaadin_testbench_unit_internal_UIFactory$0", name: "function", type: "interface kotlin.jvm.functions.Function0")
	- object (class "com.vaadin.testbench.unit.internal.MockVaadinKt$sam$com_vaadin_testbench_unit_internal_UIFactory$0", com.vaadin.testbench.unit.internal.MockVaadinKt$sam$com_vaadin_testbench_unit_internal_UIFactory$0@672173b6)
	- field (class "com.vaadin.testbench.unit.internal.MockPage", name: "uiFactory", type: "interface com.vaadin.testbench.unit.internal.UIFactory")
	- object (class "com.vaadin.testbench.unit.internal.MockPage", com.vaadin.testbench.unit.internal.MockPage@2ce0f0b9)
	- field (class "com.vaadin.flow.component.UI", name: "page", type: "class com.vaadin.flow.component.page.Page")
	- object (class "com.vaadin.testbench.unit.mocks.MockedUI", com.vaadin.testbench.unit.mocks.MockedUI@6c7a9a0b)

Which again happens because not all methods in MockVaadin.kt has defined UIFactory as parameter, but some use () -> UI.

vaadin/kubernetes-kit#187

[github-actions]

Test Results

  167 files  +11    167 suites  +11   31m 39s ⏱️ - 21m 20s
1 153 tests + 2  1 147 ✅ + 3  6 💤 ±0  0 ❌ ±0 
1 604 runs  +83  1 595 ✅ +81  9 💤 +3  0 ❌ ±0 

Results for commit 026b0af. ± Comparison against base commit e706e66.

♻️ This comment has been updated with latest results.

[vaadin-bot]

Hi @TatuLund and @TatuLund, when i performed cherry-pick to this commit to 9.5, i have encountered the following issue. Can you take a look and pick it manually?
Error Message:
Error: Command failed: git cherry-pick 4bba6bb
error: could not apply 4bba6bb... fix: Fix serialization issues in creation of Vaadin mocks (#2082)
hint: After resolving the conflicts, mark them with
hint: "git add/rm ", then run
hint: "git cherry-pick --continue".
hint: You can instead skip this commit with "git cherry-pick --skip".
hint: To abort and get back to the state before "git cherry-pick",
hint: run "git cherry-pick --abort".