[TF2] Fix deflected grenades dealing 85-170 self damage to Pyro

[num-get]

Description

Fix the deflected grenades for using the incorrect self damage value of 85-170 (flamethrower damage value) instead of 38-75 (same as demoman's grenade jump).

Before:

2026-01-01.14-15-13.mp4

After:

2026-01-01.14-18-23.mp4

[wgetJane]

i will note that grenades arent the only projectiles affected by this bug, it also affects sentry rockets and flares
mastercomfig/tf2-patches-old/pull/17

also this fix would introduce another bug (though this is a lot more minor in comparison)
mastercomfig/tf2-patches-old/issues/120

some explanation from the description of my video demonstrating this bug https://www.youtube.com/watch?v=cvGbGDuHZaI

@mastercoms has this Big Commit in her tc2 project that fixes a ton of airblast-related bugs and inconsistencies, this includes fixing the self-damage and killstreak/strange counts simultaneously
mastercomfig@d44b319

[HyperionCoding]

This isn't necessarily a bug as reflected projectiles aren't "self" exactly.

[mastercoms]

@mastercoms has this Big Commit in her tc2 project that fixes a ton of airblast-related bugs and inconsistencies, this includes fixing the self-damage and killstreak/strange counts simultaneously mastercomfig@d44b319

I haven't tested this for the latest projectiles introduced in JI, like the Dragon's Fury, Gas Passer, etc, and any other possible changes introduced then. This is holding me back from actually submitting it as a PR. If someone else can test it and make sure every reflected projectile in the game is still working properly, then it would be pretty much good to PR.

This includes:

• Wrap Assassin hit events (moonshot, Scout voicelines, etc), bleed, etc
• Sandman slow and hit events (moonshot, Scout voicelines, etc)
• Loose Cannon double donks
• Detonater flare reflect detonation bug
• Scorch shot knockback / double hit working properly
• Rescue Ranger healing friendly buildings
• Strange / killstreak counters
• Sentry rockets
• Direct Hit attributes

[JoriKos]

This isn't necessarily a bug

Considering stuff like rockets don't behave this way, and it actually changes team, it is a bug.