@aws-cdk/aws-lambda-nodejs: esbuildArgs should allow specifying alias multiple times

### Describe the bug

Very closely related to #25385.

I want to be able to specify _multiple_ aliases. There isn't currently a way to do that, since objects cannot have repeated keys. Given the API decision to specify possibly-repeated args in an object, I would expect to be able to indicate a repeated arg by supplying an array, like so
```ts
new NodejsFunction(this, 'test-function', {
// ...
bundling: {
// ...
esbuildArgs: {
'--alias': ['@layer1=/opt/nodejs/layer1', '@layer2=/opt/nodejs/layer2']
},
},
});
```

### Regression Issue

- [ ] Select this option if this issue appears to be a regression.

### Last Known Working CDK Version

_No response_

### Expected Behavior

This should result in esbuild being run with `--alias:@layer1=/opt/nodejs/layer1 --alias:@layer2=/opt/nodejs/layer2`.

### Current Behavior

(TS) Type error: Type 'string[]' is not assignable to type 'string | boolean'.

If we ignore the types and pass in an array anyway, I think at runtime this becomes `--alias:"@layer1=/opt/nodejs/layer1,@layer2=/opt/nodejs/layer2"`, which also doesn't work.

### Reproduction Steps

```ts
new NodejsFunction(this, 'test-function', {
// ...
bundling: {
// ...
esbuildArgs: {
'--alias': ['@layer1=/opt/nodejs/layer1', '@layer2=/opt/nodejs/layer2']
},
},
});
```

### Possible Solution

When an array is provided as the value, it should be mapped to specify the option multiple times, i.e. `--alias:@layer1=/opt/nodejs/layer1 --alias:@layer2=/opt/nodejs/layer2`

### Additional Information/Context

I've used essentially the same workaround as suggested in https://github.com/aws/aws-cdk/issues/25385#issuecomment-1529994229, namely

```ts
new NodejsFunction(this, 'test-function', {
// ...
bundling: {
// ...
esbuildArgs: {
'--alias:@layer1': '/opt/nodejs/layer1',
'--alias:@layer2': '/opt/nodejs/layer2'
},
},
});
```

While this works, it's a little anxiety-inducing, since it's a hack that depends on the implementation detail that `{ key: 'value' }` will be used with an equal sign, to form `key=value`.

### CDK CLI Version

2.155.0 (build 34dcc5a)

### Framework Version

_No response_

### Node.js Version

node 18

### OS

macos

### Language

TypeScript

### Language Version

_No response_

### Other information

_No response_

Start at the NodejsFunction bundling implementation that consumes esbuildArgs, then trace how the object is converted into esbuild command-line arguments. Use the TypeScript reproduction with two --alias values as the check; done means arrays are accepted by the type and produce separate --alias:value arguments while existing string and boolean values continue to work.

Written by the indexing model from the issue text.