refactor: use EventEmitter or EventTarget

[justinmk3]

Problem

We have code that is reimplementing the EventEmitter concept:

language-servers/server/aws-lsp-codewhisperer/src/shared/amazonQServiceManager/BaseAmazonQServiceManager.ts

Lines 148 to 161 in e983bfe

	private async notifyDidChangeConfigurationListeners(): Promise<void> {
	this.logging.debug('Notifying did change configuration listeners')
	const updatedConfig = this.configurationCache.getConfig()
	const listenPromises = Array.from(this.handleDidChangeConfigurationListeners, async listener => {
	try {
	await listener(updatedConfig)
	} catch (error) {
	this.logging.error(`Error occured in did change configuration listener: ${error}`)
	}
	})
	await Promise.allSettled(listenPromises)
	}

Expected behavior

replace all such code with EventEmitter or EventTarget (web compatible)