Fix null and empty values in Optionals

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The code included in this PR is in no way malicious, or used for my personal gain.
The code included in this PR is intended to benefit, add a universal feature, fix a bug(s), or make a function more efficient.
The code included in this PR is not intended for one time use/personal use. (ex. compatibility with your personal plugin)
The code included in this PR follows the licensing of it's origination.
The code included in this PR is tested, and follows all laws, regulations, rules, and other listed restrictions.

Type of Change

What type of fix(es) are included in this pull request?

[X] Bug Fix
[ ] New Feature
[ ] Other (Describe below)

Other (Only applies if Other is selected above)

Link(s) to related issue(s) and their issue number(s)

List of links to issues that this PR relates to or closes

Changes

Describe all the changes that were made

Added Optional#orElse(null) fallbacks to Optionals to replace empty string fallbacks. ("")
Removed an Optional casting in Reflection to directly return a byte[] Optional.

Testing Required

Do the applied changes require testing? (Depends on if core components were changed)

[X] Yes, these changes require testing
[ ] No, these changes do not require testing

Testing Environment (If the above is Yes)

1.19 Tests - Server Distribution (CraftBukkit, Spigot, Purpur, and it's build number): N/A - [ ] ~~Tested player joining~~ - [ ] ~~Tested chats **Player -> Server**~~ - [ ] ~~Tested command chats **Player -> Server** (Using /tell, /me, /say, etc.)~~ - [ ] ~~Tested chats **Server -> Player** (Using /say, /me, etc.)~~ - [ ] ~~Tested chat formatting (Using third party plugins such as TownyChat, EssentialsXChat, etc.)~~ - [ ] ~~Tested Reflection with above~~
1.19.1 Tests - Server Distribution (CraftBukkit, Spigot, Purpur, and it's build number): Purpur 1.19.1 Build 1751 - [X] Tested player joining - [ ] ~~Tested chats **Player -> Server**~~ - [ ] ~~Tested command chats **Player -> Server** (Using /tell, /me, /say, etc.)~~ - [ ] ~~Tested chats **Server -> Player** (Using /say, /me, etc.)~~ - [ ] ~~Tested chat formatting (Using third party plugins such as TownyChat, EssentialsXChat, etc.)~~ - [X] Tested Reflection with above
1.19.2 Tests - Server Distribution (CraftBukkit, Spigot, Purpur, and it's build number): Purpur 1.19.2 Build 1858 - [X] Tested player joining - [ ] ~~Tested chats **Player -> Server**~~ - [ ] ~~Tested command chats **Player -> Server** (Using /tell, /me, /say, etc.)~~ - [ ] ~~Tested chats **Server -> Player** (Using /say, /me, etc.)~~ - [ ] ~~Tested chat formatting (Using third party plugins such as TownyChat, EssentialsXChat, etc.)~~ - [X] Tested Reflection with above
1.19.3 Tests - Server Distribution (CraftBukkit, Spigot, Purpur, and it's build number): Purpur 1.19.3 Build 1920 - [X] Tested player joining - [ ] ~~Tested chats **Player -> Server**~~ - [ ] ~~Tested command chats **Player -> Server** (Using /tell, /me, /say, etc.)~~ - [ ] ~~Tested chats **Server -> Player** (Using /say, /me, etc.)~~ - [ ] ~~Tested chat formatting (Using third party plugins such as TownyChat, EssentialsXChat, etc.)~~ - [X] Tested Reflection with above
1.19.4 Tests - Server Distribution (CraftBukkit, Spigot, Purpur, and it's build number): Purpur 1.19.4 Build 1939 - [X] Tested player joining - [ ] ~~Tested chats **Player -> Server**~~ - [ ] ~~Tested command chats **Player -> Server** (Using /tell, /me, /say, etc.)~~ - [ ] ~~Tested chats **Server -> Player** (Using /say, /me, etc.)~~ - [ ] ~~Tested chat formatting (Using third party plugins such as TownyChat, EssentialsXChat, etc.)~~ - [X] Tested Reflection with above Special Tests - [X] Tested with environment from linked issue

Self Review

[X] I have performed a self-review of my code
[X] My code successfully compiles through Maven every time, without any compiler warnings
[X] My code has been checked for leftover development code/comments such as debug outputs

Doclic / NoEncryption