GP: sponsors page

[xbpcb]

Fix #671
Should be merged after the #683

[jimaek]

Remove all sponsors and add everyone from the current homepage list to Bronze.

Except from:
Gold:

• Zenlayer

Also needs a title "Globalping Sponsors - Join the team to expand the network"

[MartinKolarik]

• Missing the top background - update: now it loaded but in a wrong position
• Wrong icons in the list at the top
• The green boxes need the same padding as sponsors https://dl.dropboxusercontent.com/scl/fi/wdqdnv07rg9zb9y6144hu/2024-09-30_12-53-43.png?rlkey=zhd45sw5m78g4b5ceefuyd2ov&dl=0

[MartinKolarik]

@jimaek the list of sponsors is now ok?

[jimaek]

Yes looks correct