Update Yarn dependencies

[tobybellwood]

This PR

• updates updatable packages
• updates a few specific low-impact packages
• Removes unreferenced packages
• Updates the version of NewRelic Agent in use

Remaining critical is a long way down the chain, and unavailable to external access
api > graphql-rabbitmq-subscriptions > rabbitmq-pub-sub > amqplib > url-parse

From

57 vulnerabilities found - Packages audited: 811
Severity: 3 Low | 36 Moderate | 17 High | 1 Critical
Done in 3.14s

to

24 vulnerabilities found - Packages audited: 825
Severity: 17 Moderate | 6 High | 1 Critical
Done in 1.19s

docker scout compare --to uselagoon/api:v2.20.1 testlagoon/api:pr-3805
## Overview
  
                      │               Analyzed Image               │              Comparison Image               
  ────────────────────┼────────────────────────────────────────────┼─────────────────────────────────────────────
    Target            │  testlagoon/api:pr-3805                    │  uselagoon/api:v2.20.1                      
      digest          │  45336077b139                              │  6d27627c7bc5                               
      tag             │  pr-3805                                   │  v2.20.1                                    
      platform        │ linux/amd64                                │ linux/amd64                                 
      provenance      │ https://github.com/uselagoon/lagoon.git    │ https://github.com/uselagoon/lagoon.git     
                      │  09f24c51b8aebf3295bd1c79e705ea1a814065a9  │  8b8a4ef00a78b1b9fed1dfd970337de445c965a2   
      vulnerabilities │    3C    28H    37M     2L    10?          │    3C    30H    49M     5L     6?           
                      │           -2    -12     -3     +4          │                                             
      size            │ 118 MB (-1.1 MB)                           │ 119 MB                                      
      packages        │ 1309                                       │ 1309                                        
                      │                                            │                                             
    Base image        │  node:20-alpine                            │  node:20-alpine3.19                         
      tags            │ also known as                              │ also known as                               
                      │   • 20-alpine3.20                          │   • iron-alpine3.19                         
                      │   • 20.17-alpine                           │   • lts-alpine3.19                          
                      │   • 20.17-alpine3.20                       │                                             
                      │   • 20.17.0-alpine                         │                                             
                      │   • 20.17.0-alpine3.20                     │                                             
                      │   • iron-alpine                            │                                             
                      │   • iron-alpine3.20                        │                                             
                      │   • lts-alpine                             │                                             
                      │   • lts-alpine3.20                         │                                             
      vulnerabilities │    0C     1H     0M     0L                 │    1C     1H     0M     0L     1?