[MC-279503] Test block mode information strings are improperly capitalized

The Bug:

Test block mode information strings are improperly capitalized.

It's important to note that structure block mode information strings have words within them properly capitalized therefore introducing an inconsistency.

Affected Strings:

Before reading the table, please note the following:

Words colored in GREEN are correct.
Words colored in RED are incorrect.

Translation Key	Current String	Expected String	String URL on Crowdin
test_block.mode_info.start	Start Mode - The starting point for a test	Start Mode - The Starting Point for a Test	https://crowdin.com/editor/minecraft/10038/enus-engb?view=comfortable#5404204
test_block.mode_info.log	Log Mode - Log a message	Log Mode - Log a Message	https://crowdin.com/editor/minecraft/10038/enus-engb?view=comfortable#5404202
test_block.mode_info.fail	Fail Mode - Fail the test	Fail Mode - Fail the Test	https://crowdin.com/editor/minecraft/10038/enus-engb?view=comfortable#5404200
test_block.mode_info.accept	Accept Mode - Accept success for (part of) a test	Accept Mode - Accept Success for (Part of) a Test	https://crowdin.com/editor/minecraft/10038/enus-engb?view=comfortable#5404198
structure_block.mode_info.load	Load Mode - Load from File	Load Mode - Load from File	https://crowdin.com/editor/minecraft/10038/enus-engb?view=comfortable#5336178
structure_block.mode_info.data	Data Mode - Game Logic Marker	Data Mode - Game Logic Marker	https://crowdin.com/editor/minecraft/10038/enus-engb?view=comfortable#5336180
structure_block.mode_info.save	Save Mode - Write to File	Save Mode - Write to File	https://crowdin.com/editor/minecraft/10038/enus-engb?view=comfortable#5336176
structure_block.mode_info.corner	Corner Mode - Placement and Size Marker	Corner Mode - Placement and Size Marker	https://crowdin.com/editor/minecraft/10038/enus-engb?view=comfortable#5336182

Steps to Reproduce:

Place down a structure block, open it, and cycle through its modes while looking at the capitalization of the mode information strings.
Observe how the strings are consistently capitalized.
Now place down a test block, open it, and cycle through its modes while looking at the capitalization of the mode information strings.
Observe if the capitalization is consistent across structure blocks and test blocks.

Observed Behavior:

Test block mode information strings are improperly capitalized.

Expected Behavior:

Test block mode information strings would be properly capitalized.