docs: Update CSI Provider command line arguments

[tomhjp]

Updates the website with the latest flags, and also make some other small improvements to help users link things together.

[swenson]

LGTM

[brettjacobson]

@tomhjp I'd like to point out that maybe it is worth clarifying in these docs; these fields do NOT support quoted values. At least for sure the vault-addr and the vault-tls-ca-cert options do not. I am very used to quoting string value options on CLIs, but here they are NOT allowed. And the error messages gave no hints that this was my problem for 4 hours :( At least they are not allowed to be quoted in the extraArgs part of the Helm chart (hopefully the env way of setting these via helm chart will ship soon)

[brettjacobson]

@tomhjp I'd like to point out that maybe it is worth clarifying in these docs; these fields do NOT support quoted values. At least for sure the vault-addr and the vault-tls-ca-cert options do not. I am very used to quoting string value options on CLIs, but here they are NOT allowed. And the error messages gave no hints that this was my problem for 4 hours :( At least they are not allowed to be quoted in the extraArgs part of the Helm chart (hopefully the env way of setting these via helm chart will ship soon)