Add npm download metrics

[rkachowski]

Description

This pr adds npm download metrics per package taken from npm download count api, for each celo package per day and sends them to prometheus for ingestion into grafana. This adds a new metric declaration and functionality to collect different metric types.

In addition, the code is refactored somewhat

• Extracted npm / socket logic into discrete files
• Modified control flow to add explicit init step
• Some logging changes
• Created a metric type def to prevent using map[string]interface{} everywhere

Example Prometheus output

# HELP npm_download_count NPM package download count for a given day
# TYPE npm_download_count gauge
npm_download_count{date="2024-02-18",package="@celo/wallet-remote"} 180
npm_download_count{date="2024-02-18",package="@celo/wallet-rpc"} 12
# HELP socket_score Shows socket.dev packages scores
# TYPE socket_score gauge
socket_score{package="@celo/wallet-remote",score="license",version="5.1.2"} 0.8674955154068579
socket_score{package="@celo/wallet-remote",score="maintenance",version="5.1.2"} 0.6597539553864471
socket_score{package="@celo/wallet-remote",score="miscellaneous",version="5.1.2"} 0
socket_score{package="@celo/wallet-remote",score="quality",version="5.1.2"} 0.47630445736698557
socket_score{package="@celo/wallet-remote",score="supplychainrisk",version="5.1.2"} 0.3774902325656003
socket_score{package="@celo/wallet-remote",score="vulnerability",version="5.1.2"} 0.5
socket_score{package="@celo/wallet-rpc",score="license",version="5.1.2"} 0.8674955154068579
socket_score{package="@celo/wallet-rpc",score="maintenance",version="5.1.2"} 0.6597539553864471
socket_score{package="@celo/wallet-rpc",score="miscellaneous",version="5.1.2"} 0
socket_score{package="@celo/wallet-rpc",score="quality",version="5.1.2"} 0.4891786926458545
socket_score{package="@celo/wallet-rpc",score="supplychainrisk",version="5.1.2"} 0.2998454968631518
socket_score{package="@celo/wallet-rpc",score="vulnerability",version="5.1.2"} 0.5

Tested

• Tested locally
• Tested on integration-tests cluster (with dev image)

Tickets

• relates to https://github.com/celo-org/celo-labs/issues/1059