Remove rounding in weapon tracking radius sanitization

[lL1l1]

Description of the proposed changes

Fixes a bug where most weapons got 1.0 tracking radius because they were set to 1.05 but floored to 1.0.

Testing done on the proposed changes

Spawn a unit and see that it does aim at targets at 1.05x its range.

Additional context

• I was investigating why T3 mobile artillery wasn't unpacking when targets were outside on the edge of its range in reponse to this Discord suggestion for a manual pack/unpack for T3 mobile artillery when I found out that the tracking radius wasn't applying for any units. It still doesn't apply for T3 mobile arty because of NeedsUnpack = true. Working around that engine AI logic adds lots of conditionals to the lua which is buggy, and deploying when targets are nearby is possibly undesired anyway.

Checklist

• Changes are annotated, including comments where useful
• Changes are documented in the changelog for the next game version