feat: change order of Edge Functions execution

[eduardoboucas]

Summary

Runs user-defined Edge Functions before internal/framework-defined Edge Functions.

Closes https://github.com/netlify/pillar-runtime/issues/270.

[github-actions]

📊 Benchmark results

Comparing with d9bb192

Package size: 273 MB

⬇️ 0.00% decrease vs. d9bb192

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└───┴──┴────┴──┴────┴──┴────┴──┴────┴──┴────┴──┴────┴──┴────┴──┴────┴──┴────┴──┴────┴──┴────┴──┴────┴──┴──>
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Legend

• T-30 (d9bb192): 273 MB
• T-29 (129216e): 273 MB
• T-28 (59c3670): 273 MB
• T-27 (fbd4510): 380 MB
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• T-25 (d8bc64e): 380 MB
• T-24 (02c8c8a): 380 MB
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• T-22 (647ad4d): 380 MB
• T-21 (c285dbc): 380 MB
• T-20 (4ad0b45): 380 MB
• T-19 (a668861): 380 MB
• T-18 (1cb5a91): 380 MB
• T-17 (15f34db): 380 MB
• T-16 (3725113): 380 MB
• T-15 (62e64c4): 380 MB
• T-14 (3840cc4): 380 MB
• T-13 (0f69bb5): 380 MB
• T-12 (ccd26a5): 380 MB
• T-11 (6866549): 380 MB
• T-10 (6a16b6e): 380 MB
• T-9 (1fd0c2c): 380 MB
• T-8 (84fa9f6): 380 MB
• T-7 (e4f6ef0): 380 MB
• T-6 (ec31485): 380 MB
• T-5 (14d3714): 380 MB
• T-4 (0b40103): 380 MB
• T-3 (4110a26): 380 MB
• T-2 (d870da4): 380 MB
• T-1 (fc702d0): 380 MB
• T (current commit): 273 MB