feat(lambda-at-edge): copy additional JS files to handlers

[dphang]

• Needed in Next.js 12
• There are still some fixes needed to renderReqToHtml function which is currently breaking ISR etc.

[slsnextbot]

Handler Size Report

No changes to handler sizes.

Base Handler Sizes (kB) (commit 6e27aa9)

{
    "Lambda": {
        "Default Lambda": {
            "Standard": 1495,
            "Minified": 658
        },
        "Image Lambda": {
            "Standard": 1461,
            "Minified": 792
        }
    },
    "Lambda@Edge": {
        "Default Lambda": {
            "Standard": 1506,
            "Minified": 664
        },
        "Default Lambda V2": {
            "Standard": 1498,
            "Minified": 660
        },
        "API Lambda": {
            "Standard": 632,
            "Minified": 318
        },
        "Image Lambda": {
            "Standard": 1470,
            "Minified": 797
        },
        "Regeneration Lambda": {
            "Standard": 1163,
            "Minified": 537
        },
        "Regeneration Lambda V2": {
            "Standard": 1228,
            "Minified": 564
        }
    }
}

New Handler Sizes (kB) (commit eee88ce)

{
    "Lambda": {
        "Default Lambda": {
            "Standard": 1495,
            "Minified": 658
        },
        "Image Lambda": {
            "Standard": 1461,
            "Minified": 792
        }
    },
    "Lambda@Edge": {
        "Default Lambda": {
            "Standard": 1506,
            "Minified": 664
        },
        "Default Lambda V2": {
            "Standard": 1498,
            "Minified": 660
        },
        "API Lambda": {
            "Standard": 632,
            "Minified": 318
        },
        "Image Lambda": {
            "Standard": 1470,
            "Minified": 797
        },
        "Regeneration Lambda": {
            "Standard": 1163,
            "Minified": 537
        },
        "Regeneration Lambda V2": {
            "Standard": 1228,
            "Minified": 564
        }
    }
}

[codecov]

Codecov Report

Merging #1970 (eee88ce) into master (6e27aa9) will increase coverage by 0.03%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #1970      +/-   ##
==========================================
+ Coverage   83.75%   83.79%   +0.03%     
==========================================
  Files         100      100              
  Lines        3601     3609       +8     
  Branches     1134     1140       +6     
==========================================
+ Hits         3016     3024       +8     
  Misses        525      525              
  Partials       60       60              

Impacted Files	Coverage Δ
packages/libs/lambda-at-edge/src/build.ts	96.06% <100.00%> (+0.12%)	⬆️

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