Fix Incorrect URL query parameters encoding mechanism

[mallexxx]

Task/Issue URL: https://github.com/duckduckgo/iOS/issues/1191 Tech Design URL: CC: @miasma13

Description:

• Updated URL constructors to use BSK addParameter
• Moved URL.removeParameter to BSK

Steps to test this PR:

1. Validate ";foo" search request works as expected

Copy Testing:

• [ ] Use of correct apostrophes in new copy, ie ’ rather than '

Orientation Testing:

• [ ] Portrait
• [ ] Landscape

Device Testing:

• [ ] iPhone SE (1st Gen)
• [ ] iPhone 8
• [ ] iPhone X
• [ ] iPad

OS Testing:

• [ ] iOS 13
• [ ] iOS 14
• [ ] iOS 15

Theme Testing:

• [ ] Light theme
• [ ] Dark theme

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Internal references:

Software Engineering Expectations Technical Design Template When ready for review, remember to post the PR in MM