Replace all discord links with permanent upload links

[ethteck]

Several links in values.yaml are still pointing to discord links which are no longer valid. We should replace these with links that are more reliable.

• [ ] &nds_mwcc
• [ ] &3ds_armcc
• [ ] ee-gcc2.9-990721
• [ ] ee-gcc2.9-991111
• [ ] ee-gcc2.9-991111a
• [ ] ee-gcc2.9-991111-01
• [ ] ee-gcc2.96
• [ ] ee-gcc3.2-040921
• [ ] ee-gcc2.95.2-273a
• [ ] ee-gcc2.95.2-274
• [ ] ee-gcc2.95.3-107
• [ ] ee-gcc2.95.3-114
• [ ] ee-gcc2.95.3-136
• [ ] mwcps2-2.3-991202
• [ ] mwcps2-3.0b22-020926