fix: `quiet` & `debug` should be forwarded as is to `render_single_qmd()` then `quarto_render()`

[ColinFay]

Description

quarto_render() has both debug & quiet, but these params are not forwarded from compile_qmd_course() and render_single_qmd():

This is the current logic:

• If quiet is FALSE in compile_qmd_course() then quiet is TRUE in quarto_render()

compile_qmd_course(quiet = FALSE, debug = FALSE) 
# then
render_single_qmd(quiet = !debug) # TRUE 
# then
quarto_render(quiet = TRUE)

• If quiet is TRUE in compile_qmd_course() then quiet is FALSE in quarto_render()

compile_qmd_course(quiet = TRUE, debug = TRUE) 
# then
render_single_qmd(quiet = !debug) # FALSE 
# then
quarto_render(quiet = FALSE)

This behavior makes it hard to reason about the function logic.